I wrote #2 as a result of a web automation tool I a working on. It's easier to show than tell.

This is a video of me "vibe-coding" a userscript that adds a darkmode toggle to hacker news: https://screen.studio/share/r0wb8jnQ

The actual purpose of the vibe-coding userscripts feature is to vibe code WebMCP servers that the extension can then use for browser automation tasks.

Everything is still very WIP, but I can give you beta access if you want to play around with it